Warp-tensioning device.



E. BBELL.

WARP TENSIONING DEVICE.

APPLICATION TILED SEPT. o, 1914.

1,124,878, Patented Jan. 12, 1915.

772 1266696. fizuc-v'zr.

THE NORRIS PETERS CO. PHOTOLITHO.. WASHINGTON, D, C.

EMIL EBELL, or NEUBUPPIN, GERMANY.

WABIP-TENSIONING DEVICE.

1,124,87&

Specification of Letters Patent.

PatentedJ an. 123, 1915.

Application filed September 9, 1914. Serial No. 860,824.

To all whom it may concern:

Be it known that I, EMIL EBELL, a German subject, and resident of No. 3,Rhemsbergerstrasse, Neuruppin, German Empire, 7

have invented an Improved and Novel VVarp-Tensioning Device, of whichthe following is a specification.

This invention relates to a warp tensioning device for looms, especiallysuch for the manufacture of so-called strong woven fabrics, particularlydriving belts consisting of a plurality of layers which are connectedwith each other, or interwoven respectively.

The gist of the invention consists in this that each of the variousgroups of warp threads which all are led in known manner from a spoolholding frame to the loom is subjected to the action of a specialcontrivance that makes it possible to employ threads of differentthickness or strength and allows of easily regulatingor changing thedensity of the weft, the tension of the thus acted-on warp threadsbeing, however, always uniform, as will become more clear from thedetailed description here follow- In this connection I refer to theaccompanying drawing which shows a diagrammatical representation of oneform of construction of the device in question shown as an example; thisform of execution is intended especially for looms for belts, the

warp threads of which are to be led to the loom in groups located oneabove the other; there are three such groups in the example in question.

The loom proper is merely indicated by the letter A. a a a are the threesets or groups of warp threads which are coming from spools, 2'. 6. setsor groups of such spools, not shown. 6 b b are thread guides. Sincethere are in the example shown three groups of threads and consequently,three thread guides, there are also three of the special tensioningdevices before-mentioned which are of like construction. Owing to thislatter fact, it is sufficient to describe only one of them.

0 d e f are four rollers, of which d e f are connected with each otherby cog wheels, as shown; the shafts or pivots of these rollers withtheir gearing-forming pinions are supported in the frame of theapparatus. The fourth or, more precisely, first roller, viz. c, iscarried by two levers g fulcrumed also to the frame and having each aweight g? which may be displaced upon the respective lever so as therebyto regulate or change the pressure exertedby the weight upon the roller0 and thus upon the roller d, too, the roller 0 being in immediatecontact with said other roller. The intermediate roller 6 is supportedin the frame not directly but indirectly by the mediation of verticallyadjustable bolts, as shown in dotted lines, so that the roller 6 may beadjusted in height with respect to the rollers 03 and f, or, in

other words, may be adjusted with respect to the thickness of thethreads to be passed through between the rollers in question.

The threads are led from the guide 6 (or b or b respectively) over theroller 0, through between the rollers 0 and d, through between therollers 03 and e, and through between the rollers e and f, as shown.Between 0 and (Z they are subjected to the combined" pressure of theparts a g 9 and between the rollers e and (Z, as well as e and 7", theypass through with either no additional friction at all or but littleone, the distance between these rollers being generally determinedexactly according to the thickness of the respective threads. There is,however, another means provided by which the threads may be, and are,put under tension, viz. a band brake h cooperating with a disk or pulleyh keyed to the shaft of the roller cl. The band 71. is connected at oneend with the frame of the apparatus and at the other end with a lever 2'bearing a weight 2' Obviously the band 71, is exposed to the pull of theweighted lever 71 2' and the resistance thereby produced is transmittedby the disk. or pulley h and the roller d to the threads which are thussubjected to a tension of corresponding degree.

It becomes obvious from the above de-' scription that comparativelythin, as well as comparatively thick threads may be led to the loomunder uniform tension, and as this latter may be changed by the meansdescribed, whereas the shuttle reciprocates without any change whateverin respect to speed, the density of the fabric may be changed orregulated corresponding to the requirements of the case.

Having now described my invention, what I desire to secure by a patentof the United States is:

In a warp tensioning device, the combination, with a plurality of groupsof warp threads, of a like number of sets of rollers comprising each.four rollers; adjustable Weighted levers so arranged as to be adapted topress the first roller against the second; a gearing connecting thesecond, third, and fourth roller with each other; means for adjustingthe third roller With respect to the second and the fourth; and anadjustable brake so arranged as to be adapted to cooperate With thesecond roller and tend- 10 ing to counter-act its rotation by frictionalresistance, substantially and for the purpose as described.

In witness whereof I have hereunto signed my name this 15 day ofAugust1914:, in the presence of tWo Witnesses.

EMIL EBELL.

Witnesses CARL VVEPHAUn, MAX PIEPER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. 0.

